http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 임대현 (검색결과 185 건)
- 무료
- 기관 내 무료
- 유료
-
-
-
임대현,김정희,손병관,나영호 대한의사협회 2010 대한의사협회지 Vol.53 No.5
Children aged 3~5 years old represent the challenge in pulmonary function assessment, since evaluating lung function in preschool age group is important for the appropriate treatment for patient with chronic and recurrent cough and wheeze during this period. The joint American Thoracic Society/European Respiratory Society task force has produced recommendations for the spirometric lung function test currently used in the preschool age group. The reliable scientific evidence, documented references and reviews by the experts were used as a support. Reference data of spirometry lung function in preschool children were available in several countries including USA, Norway, Czech, Israel, Canada, and Taiwan. Spirometric pulmonary function tests are feasible in 3~ to 5~year~old children. However, the existing data are not sufficient to make definitive recommendations. Recommendations will need to be revised periodically until sufficient evidence has been collected to make definitive guidelines in various situations.
-
저생 미생물 연료전지(Benthic Microbial Fuel Cells, BMFC)의 성능 향상에 관한 연구
임대현,김지원,김엘림,김영숙,추천호,박권필 한국공업화학회 2020 한국공업화학회 연구논문 초록집 Vol.2020 No.-
수자원의 오염이 전세계적으로 심각한 문제로 부각되고 있는 지금 수중 퇴적물의 정화는 수질환경 개선에 매우 중요하게 부각되고 있다. 수중 퇴적물 정화 방법 중 저생 미생물 연료전지(BMFC)는 생물학적 정화방법의 하나이면서 바다나 호수의 뻘 속에 미생물을 이용해 생물학적으로 분해 가능한 유기물로부터 전기를 생산하는 공정이다. 뻘 속에서 미생물이 번식하고 효소가 유기물질을 분해하여 생성된 수소이온이 anode에서 cathode로 이동하고, 산소를 공급해주면 환원반응이 일어난다. BMFC는 폐수처리와 재생에너지의 생산 이외에도 퇴적물을 이용한 미생물 연료전지, 생물환경정화기술 등 여러 분야에서 적용 될 수 있다. 본 연구에서는 폐유기물을 분해하는 BMFC의 성능을 향상시키기 위해 첨가해야 할 성분들과 건조 주기 영향에 대해서 연구하였다. 첨가 성분들은 N, P, Na, K, Vitamins 등을 검토하였다. 건조주기는 No Drying과 1 Day-Drying로 진행하였으며, 유기폐기물 (박력분4%) 갯벌 혼합물에서 첨가 종류에 따라 성능에 미치는 영향을 검토하였다. 건조 조건에서는 1일 건조, 첨가 종류에 따라서는 Vitamin이 높은 성능을 나타내었다.
-
PEMFC용 고분자전해질 막의 전기화학적/기계적 가속 내구 평가 방법 연구
임대현,정회범,박권필 한국공업화학회 2020 한국공업화학회 연구논문 초록집 Vol.2020 No.-
고분자전해질 연료전지(PEMFC)의 내구성 향상을 위해서 내구성 평가는 필수적인데 내구성 평가 시간이 장시간 요구되는 단점이 있다. 이에 내구성 평가 시간을 단축하기 위해 고분자전해질 막의 전기화학적(OCV holding)/기계적열화(가습/건조)를 동시에 진행해 막의 열화를 가속하는 Accelerated stress test (AST) Protocol이 2016년 미국 에너지부(DOE)에서 개발하였다. 개발 된 DOE AST는 OCV Holding과 가습/건조를 동시에 진행하는데 45s/30s로 가습시간이 더 길어서 주로 막의 열화가 진행되어야 하는데 전극 열화가 많이 진행되는 문제점이 있다. 본 연구에서는 DOE Protocol의 전극 열화가 발생하는 문제점을 해결하고자 시간을 30s/45s로 건조 시간을 더 길게 하여 고분자전해질 막의 내구 평가를 진행하였다. LSV(Linear sweep voltammetry)를 이용해 수소투과 전류 밀도를 확인하여 막의 열화를 확인하였고 전극 열화는 CV(cyclic voltammetry)를 이용하여 전극 활성 면적(ECSA)으로 확인하였다. DOE Protocol의 가습/건조 시간을 45s/30s에서 30s/45s 건조되는 시간을 더 길게 했을 때 전극 열화가 더 적게 발생하는 것을 확인할 수 있었다.
-
-
-
임대현 대한소아청소년과학회 2008 Clinical and Experimental Pediatrics (CEP) Vol.51 No.4
Anaphylaxis is an acute systemic reaction caused by IgE-mediated immunological release of mediators from mast cells and basophils to allergenic triggers, such as food, insect venoms, and medications. An alternative definition was recently proposed as follows: anaphylaxis is a "condition caused by an IgE mediated reaction" that is "often life threatening and almost always unanticipated." The reaction can be severe enough to lead to the rapid onset of symptoms, including dizziness, upper airway occlusion, bronchial constriction, hypotension, urticaria, cardiovascular arrhythmias and possible cardiac arrest. The incidence or prevalence of anaphylaxis in Korean pediatrics has not known. Thus, Epidemiology of Anaphylaxis in Pediatrics based on the data from Korean Health Insurance Review and Assessment Service (KHIRA) from 2001 to 2007 and questionnaire to the member of Korean Academy of Pediatric Allergy and Respiratory Disease (KAPARD) who are working at the training hospitals was studied. The incidence of anaphylaxis under age 19 is 0.7-1.0 per 100,000 year-person. The causes of anaphylaxis based on data from KHIRA were unknown (61.7%), food (24.9%), medications (12.4%), and serum (1.0%).
-
임대현 대한소아청소년과학회 2005 Clinical and Experimental Pediatrics (CEP) Vol.48 No.10
Asthma is characterized by a chronic inflammatory disorder of the airways that leads to tissue injury and subsequent structural changes collectively called airway remodelling. Characteristic changes of airway remodelling in asthma include goblet cell hyperplasia, deposition of collagens in the basement membrane, increased number and size of microvessels, hypertrophy and hyperplasia of airway smooth muscle, and hypertrophy of submucosal glands. Apart from inflammatory cells, such as eosinophils, activated T cells, mast cells and macrophages, structural tissue cells such as epithelial cells, fibroblasts and smooth muscle cells can also play an important effector role through the release of a variety of mediators, cytokines, chemokines, and growth factors. Through a variety of inflammatory mediators, epithelial and mesenchymal cells cause persistence of the inflammatory infiltrate and induce airway structural remodelling. The end result of chronic airway inflammation and remodelling is an increased thickness of the airway wall, leading to a increased the bronchial hyperresponsiveness and fixed declined lung function.
-
학령전기소아 천식환자에서 흡입스테로이드 치료의 최신 경향
임대현,김정희,손병관 대한의사협회 2012 대한의사협회지 Vol.55 No.12
Daily low-dose inhaled corticosteroid in preschool children with asthma is recommended to prevent the development of asthma symptom and sign based on many asthma management guidelines. But the retarded growth after long-term steroid inhalation has been concerned. Recently the method of intermittent high-dose (suspension, 1,000 μg, 2 times a day for 7 days)budesonide inhalation when the initial phase to develop the asthma exacerbation was studied to compare the efficacy and safety with daily low-dose budesonide (500 μg) inhalation regimen in preschool children positive with modified asthma predictive index in recurrent wheezer during the study period with 52 weeks. There were no significant difference between two regimen with respect to the frequency of exacerbations, the time to the first exacerbation and to the second exacerbation, and the frequency of treatment failure. The total exposure to budesonide over the period was less in the intermittent high-dose regimen than in the daily low-dose regimen. There were no significant difference in change in height. But the change in height from baseline in intermittent high-dose regimen group was 8.01 cm and in daily low-dose was 7.76 cm. We need the more clinical studies in preschool children with persistent moderate and severe asthma and in various country and nations. It is suggested the intermittent high-dose budesonide inhalation regimen in preschool children with freqeunt wheezing may be a very good alternative to control the allergic inflammation and symptoms of asthma without concerning the adverse effect of steroid.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
